When Katherine 'Kat' Harlow was ten-years-old, she killed her parents. Showing no sign of remorse, she was said to be a girl devoid of conscience or soul - a Hollow Girl. Six years later, she reappeared as a brutal masked vigilante, avenging the dead with retributive violence.
That is what most people know about Hollow Girl. That's enough, right? Wrong.
Because there is a question that was never asked back when it all began, the answer to which changes everything.